Okay, I took the car to the dealer, sure enough he said it was a gas code. Not a big deal. However here is something interesting he told me. He said that even though te exhaust and intake effect the way the A/F ratio run compared to stock they shuld not void the warranty. He told me in some cases long tbe headers MAY void a warranty but he hasn't sen that issue yet on a 370z (probably because it is still new). He said if it was evap lines the exhaust won't void the warranty even though I removed the heat shield at the rear end of the car to install the exhaust. Furthermore I have this insanely annoying "creek" in the hatch area of my Z. He said that as long as it is withing 12k miles it wil be covered. After 12k miles it will now be covered and the dealer told me they couldn't fix it I would have to take it to a body shop which would be covered which I think is sort of
The passeneger side of my hatch has a 6-7mm gap comapred to the 3-4mm gap on the driver side.
I think we should provide a sticky of all the little issues that our Z's have had and how dealer respond to them with warranties, stock, modded, etc. It provides much more insight I think to other members who have these small things like a gas cap that seems to work fine but throws CEL's or a creek in a hatch that can't be fixed wuthout a week in a body shop.